HI I All I just had a problem with my Grizzly 5 lb stuffer. So I'm posting, just in case some one else has the same problem. When the piston was at the bottom it would not come back up, for some reason it was NOT threaded on too tightly. So there I was with the rod coming back up and piston lodge in the bottom, tight as tight can be..What to do, I tried pulling it up by valve release nut, would not budge. Next I looked to take the the stuffer apart, I didn't have clue,I know they do come apart cause people on here have replaced the gears.Here is what I did to resolve the problem, turn the stuffer upside down and threaded the rod onto the piston, low and behold piston/plunger came back up. Called Grizzly they were very polite and was looking for a way to resolve my problem. While waiting for there return call, I got it fixed.. Now what is best way to take it apart? Thanks Dan Hope this may help someone.